Drupal 8.x

Hi, my pagination no longer works :-(

Sometimes it appears, sometimes it disappears. I do not understand what is happening.

There are no errors in the logs and no errors in the console.

Can you help me find the cause of this bug ? Thank you

Here is a page of my site with a pagination, you have to reload the page several times to see the problem :

https://dev.s1biose.com/fr/article

I have configured SMTP Authentication Support on my new Drupal 8.9.x site and do receive notification emails from my mail server about new releases that are available. However, they look exactly as follows:

I am working on a site redesign project. For some timeframe, we need to use two different themes, the current one and the redesign. I am using the theme switcher module to show both themes on production at the same time for their respective pages.

Hello, 

I installed a Drupal 8.8 on a Hostgator Shared Hosting site 18 months ago, and it's been running great - Drupal is probably overkill for what I needed for a 3 page site but it's what I know... 

I have turned on verbose bugging using settings.local.php and am getting the following error:

Fatal error: Interface 'JsonSerializable' not found in /public_html/mydomain.com/core/lib/Drupal/Component/Render/MarkupInterface.php on line 32

I have two languages English and German. German(with de prefix) is default . I have my whole content in german language in url all urls contain /de/. Now in there are some links which are on old site which we need to add redirect in drupal site.  But when i try to add redirect it not working. I am using Redirect module

For example my page is
/de/one.html and i want to add redirect /en/one.html which must redirect to /de/one.html
Steps to reproduce

Hello All,

Is there any possibility of indexing CSV file (As Drupal Datasources) into Search API Module.

I am currently using elasticsearch_connector module as backend server & Serach_api module to index Drupal content into Elasticsearch.

Is there any module Or document that can help to work on the above scenario.